A composite of nano-zerovalent iron (nZVI) supported on granular activated carbon (GAC) was synthesizedthrough adsorption-reduction method, and its performances used as catalyst of Fenton-like were investigated to degrade methylene blue (MB) in model wastewater.Theresults show thathomogeneous dispersion of nZVI was greatly improved after supported on GAC. In comparison, the composite (nZVI/GAC)...

The increasing demand for fatty aldehydes as natural flavoring agents nowadays grapples with current production processes requiring harsh reaction conditions and hazardous chemicals. Our research group proved the concept of an innovative, sustainable process based on renewable plant oils aldehyde production: acids reduction via zerovalent iron. In this study, we present first time extensive sup...

There is considerable interest in hydrodynamic instabilities in dead zones of protoplanetary disks as a mechanism for driving angular momentum transport and as a source of particle-trapping vortices to mix chondrules and incubate planetesimal formation. We present simulations with a pseudo-spectral anelastic code and with the compressible code Athena, showing that stably stratified flows in a s...

Abiotic degradative pathways are often overlooked when evaluating natural attenuation at chlorinated solvent sites. Yet, at many sites, significant degradation of parent compounds such as 1,1,1-TCA, PCE and TCE is observed without the corresponding accumulation of daughter products, a sure indication of abiotic reactions. The problems in integrating abiotic processes into MNA are how to prove t...

The objective of this investigation is to synthesize and investigate zero-valent iron (ZVI) nanoparticles (NPs) for bioremediation applications. ZVI-NPs were fabricated by chemical reduction using a ferrous salt solution with poly(N-vinylpyrrolidone) (PVP), used as stabilizer. synthesis was conducted without ultrasonic treatment. ZVI NPs characterized scanning electron microscopy (SEM), transmi...

Nanoscale zerovalent iron (NZVI) rapidly transforms many environmental contaminants to benign products and is a promising in-situ remediation agent. To be effective, NZVI should form stable dispersions in water such that it can be delivered in water-saturated porous media to the contaminated area. Limited mobility of NZVI has been reported, however, attributed to its rapid aggregation. This stu...

Polluted aquifers can be decontaminated using either ZVI (zero valent iron) permeable reactive barriers (PRB) or injected ZVI. The placement of within the aquifer may take several decades to remediate contaminant plume. Remediation is further complicated by acting as an adsorbent remove some pollutants, while for other it acts a remediation catalyst. This study investigates alternative decontam...

Pretreatments of pH and heat with zero-valent iron (ZVI) additions enhance anaerobic digestion increase reducing sugar availability for optimum biogas production. This study aimed to optimize the conditions different pretreatment additional ZVI yield higher amounts from (AD) cassava wastewater. Thirteen conditions, ten concentrations, eleven heating periods were varied measured standard conditi...

Zvi Hecker (Krakow, 1931) is a Polish -Israeli architect and artist. After the Second World War years spent with his family in Samarkand where he first approached architecture by sketching monumental Islamic buildings, began studies Krakow completed them at Technion Haifa, graduated 1955. Later studied painting Avni Academy of Fine Arts Tel Aviv. From 1960, an office Aviv until 1966 association...